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23 May 2019 Correction of hyperopia by intrastromal cutting and liquid filler injection
Sebastian Freidank, Alfred Vogel, Richard R. Anderson, Reginald Birngruber, Norbert Linz
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Journal of Biomedical Optics, Vol. 24, Issue 5, 058001 (May 2019). https://doi.org/10.1117/1.JBO.24.5.058001
Abstract
Correction of hyperopia requires an increase of the refractive power by steepening of the corneal surface. Present refractive surgical techniques based on corneal ablation (LASIK) or intrastromal lenticule extraction (SMILE) are problematic due to epithelial regrowth. Recently, it was shown that correction of low hyperopia can be achieved by implanting intracorneal inlays or allogeneic lenticules. We demonstrate a steepening of the anterior corneal surface after injection of a transparent, liquid filler material into a laser-dissected intrastromal pocket. We performed the study on ex-vivo porcine eyes. The increase of the refractive power was evaluated by optical coherence tomography (OCT). For a circular pocket, injection of 1 μl filler material increased the refractive power by +4.5 diopters. An astigmatism correction is possible when ellipsoidal intrastromal pockets are created. Injection of 2 μl filler material into an ellipsoidal pocket increased the refractive power by +10.9  dpt on the short and +5.1  dpt on the long axis. OCT will enable to monitor the refractive change during filler injection and is thus a promising technique for real-time dosimetry.
CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.
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Sebastian Freidank, Alfred Vogel, Richard R. Anderson, Reginald Birngruber, and Norbert Linz "Correction of hyperopia by intrastromal cutting and liquid filler injection," Journal of Biomedical Optics 24(5), 058001 (23 May 2019). https://doi.org/10.1117/1.JBO.24.5.058001
Received: 13 December 2018; Accepted: 30 April 2019; Published: 23 May 2019
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Cited by 6 scholarly publications.
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KEYWORDS
Cornea
Optical coherence tomography
Liquids
Laser cutting
Eye
Laser vision correction
Refractive index
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